20479502484 has 84 divisors (see below), whose sum is σ = 61410476064. Its totient is φ = 5851280592.

The previous prime is 20479502447. The next prime is 20479502497. The reversal of 20479502484 is 48420597402.

20479502484 is a `hidden beast` number, since 20 + 47 + 9 + 502 + 4 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 481242 + ... + 522065.

It is an arithmetic number, because the mean of its divisors is an integer number (731077096).

Almost surely, 2^20479502484 is an apocalyptic number.

It is an amenable number.

20479502484 is an abundant number, since it is smaller than the sum of its proper divisors (40930973580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20479502484 is a wasteful number, since it uses less digits than its factorization.

20479502484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003336 (or 1003319 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20479502484 in words is "twenty billion, four hundred seventy-nine million, five hundred two thousand, four hundred eighty-four".